Table 2.
Standard and optimized parameters of the SAGE model.
| Parameter | Description | Standard value | Optimized value |
|---|---|---|---|
| αSF | Star formation efficiency | 0.05 | 0.76795 |
| εdisc | Mass-loading factor due to supernovae | 3.0 | 2.62696 |
| εhalo | Efficiency of supernovae to unbind gas from the hot halo | 0.3 | 0.57674 |
| κreinc | Sets velocity scale for gas reincorporation | 0.15 | 0.12156 |
| κR | Radio mode feedback efficiency | 0.08 | 0.13682 |
| κQ | Quasar mode feedback efficiency | 0.005 | 0.00924 |
| fBH | Rate of black hole growth during quasar mode | 0.015 | 0.00424 |
| fmajor | Threshold mass ratio for merger to be major | 0.3 | 0.30224 |
| ffriction | Threshold subhalo-to-baryonic mass for satellite disruption or merging | 1.0 | 0.82527 |
Notes. The standard parameter values were obtained from the calibration of SAGE on a smaller, representative volume of the MDPL2 simulation (Knebe et al. 2017). The optimized values correspond to our calibration on The Three Hundred 7K-DMO simulations using particle swarm optimisation.
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